W3School TIY Editor

import java.io.File; import java.io.IOException; public class CreateFile { public static void main(String[] args) { try { File myObj = new File("filename.txt"); if (myObj.createNewFile()) { System.out.println("文件已创建: " + myObj.getName()); } else { System.out.println("文件已存在。"); } } catch (IOException e) { System.out.println("发生错误。"); e.printStackTrace(); } } }